I netfiled a few weeks ago by putting the total amount of Box 21 into Box 53. But make sure you also put that same amount in Box 21. It will not calculate it 2 times. Use the first Box 53, Total Capital gains and make sure it is the same amount as Box 21. For 2024, it would have made a difference to differentiate the capital gains when they were earned (On or before June 24), but the Federal government dropped the way they were supposed to treat the Capital Gain in January/February 2025. So it doesn't matter anymore as the capital gains will be calculated in the same way as before.
Hope it works for you...
